The transparent PVC stretch film for packaging meat, fruits, cold cuts and other food products, as well as for protecting surfaces, inactivates the novel coronavirus.
The material from the Brazilian plastics manufacturer Alpes contains silver and silica nanoparticles. This technology developed and licensed by Nanox based in São Paulo, Brazil
In tests conducted in the Biosafety Level III Laboratory (BSL-3) at the Institute of Biomedical Sciences of the University of São Paulo (ICB-USP), PVC film inactivated 79.9% of SARS-CoV-2 particles in three minutes and 99.99 % – in 15 minutes.
The films have been tested against the technical standard ISO 21702: 2019. They govern the measurement of antiviral activity on plastic and other non-porous surfaces.
Samples of the material with and without silver and silicon dioxide nanoparticles were in direct contact with SARS-CoV-2 for different times. Thereafter, the viral particles found in the material were removed and the replication rate was measured after exposure to the film.
Viral genetic material was quantified using PCR. The analysis showed a decrease of almost 100% in copies of SARS-CoV-2 after 15 minutes of film exposure.
“Considering that the film is used to package food products that are displayed and processed in supermarkets, 15 minutes for the film to completely destroy the virus from the surface of the material is satisfactory,” concludes Nanox CEO Luis Gustavo Pagotto Simões.
Alpes has been selling plastic wrap with silver nanoparticles for food packaging to protect foods from fungi and bacteria in supermarkets and homes since 2014. With the onset of the COVID-19 pandemic, it was decided to test if this material could also eliminate SARS-CoV-2.